def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
if len(argv) != 1:
raise gdb.GdbError('offsets-of takes exactly 1 argument.')
stype = gdb.lookup_type(argv[0])
print argv[0], '{'
for field in stype.fields():
print ' %s => %d' % (field.name, field.bitpos//8)
print '}'
def call(prompt, *args):
cmd = [
sys.executable,
os.path.join(gdb.PYTHONDIR, 'readinput.py'), '-p', prompt
]
cmd.extend(list(args))
try:
proc = subprocess.Popen(cmd, stderr=subprocess.PIPE)
out = proc.communicate()[1]
except OSError, e:
raise gdb.GdbError('cannot run readinput: ' + str(e))
def __init__(self, address):
if address != NULL_PTR:
self.address = address
self.task_lst_ptr = address + TaskOffsets.TASK_NEXT.value
self.threads_lst_ptr = address + TaskOffsets.THREAD_LST_FROM_TASK.value
self.bsd_info_ptr = getPointerAt(address +
TaskOffsets.BSD_INFO.value)
self.bsdinfo_object = BsdInfo(self.bsd_info_ptr)
else:
raise gdb.GdbError(f"Null pointer in {__name__}")
def get_target_endianness():
global target_endianness
if target_endianness is None:
endian = gdb.execute("show endian", to_string=True)
if "little endian" in endian:
target_endianness = LITTLE_ENDIAN
elif "big endian" in endian:
target_endianness = BIG_ENDIAN
else:
raise gdb.GdbError("unknown endianness '{0}'".format(str(endian)))
return target_endianness
def __init__(self):
super(NX_show_heap, self).__init__('show heap', gdb.COMMAND_USER)
struct_mm_allocnode_s = gdb.lookup_type('struct mm_allocnode_s')
preceding_size = struct_mm_allocnode_s['preceding'].type.sizeof
if preceding_size == 2:
self._allocflag = 0x8000
elif preceding_size == 4:
self._allocflag = 0x80000000
else:
raise gdb.GdbError('invalid mm_allocnode_s.preceding size %u' % preceding_size)
self._allocnodesize = struct_mm_allocnode_s.sizeof
def execute_get_val(val, size):
try:
check_arguments(size)
command = f"x /1x{size} {hex(val)}"
LOGGER.debug("Going to excute %s ", command)
res = gdb.execute(command, to_string=True)
res = int(res.split()[1], 0)
LOGGER.debug("Got a result %s ", str(res))
return res
except Exception:
raise gdb.GdbError(f"{traceback.format_exc()}")
def invoke(self, arg, from_tty):
try:
argv = gdb.string_to_argv(arg)
if len(argv) == 1 and sys_info.is_valid_ptr(int(argv[0], 0)):
voucher = int(argv[0], 0)
gdb.write(
types.ThreadVoucher(voucher).print_voucher_info() + '\n')
else:
gdb.write("wrong args\n")
except Exception:
raise gdb.GdbError(traceback.format_exc())
def invoke(self, args, from_tty):
if isinstance(args, BYTES):
args = args.decode(_filesystemencoding)
for arg in string_to_argv(args):
try:
f = open(arg)
except OSError as e:
raise gdb.GdbError('Unable to open file %r: %s' %
(args, e.args[1]))
t = etree.parse(f)
for module in t.getroot():
cython_module = CythonModule(**module.attrib)
self.cy.cython_namespace[cython_module.name] = cython_module
for variable in module.find('Globals'):
d = variable.attrib
cython_module.globals[d['name']] = CythonVariable(**d)
for function in module.find('Functions'):
cython_function = CythonFunction(module=cython_module,
**function.attrib)
# update the global function mappings
name = cython_function.name
qname = cython_function.qualified_name
self.cy.functions_by_name[name].append(cython_function)
self.cy.functions_by_qualified_name[
cython_function.qualified_name] = cython_function
self.cy.functions_by_cname[
cython_function.cname] = cython_function
d = cython_module.functions[qname] = cython_function
for local in function.find('Locals'):
d = local.attrib
cython_function.locals[d['name']] = CythonVariable(**d)
for step_into_func in function.find('StepIntoFunctions'):
d = step_into_func.attrib
cython_function.step_into_functions.add(d['name'])
cython_function.arguments.extend(
funcarg.tag for funcarg in function.find('Arguments'))
for marker in module.find('LineNumberMapping'):
cython_lineno = int(marker.attrib['cython_lineno'])
c_linenos = list(
map(int, marker.attrib['c_linenos'].split()))
cython_module.lineno_cy2c[cython_lineno] = min(c_linenos)
for c_lineno in c_linenos:
cython_module.lineno_c2cy[c_lineno] = cython_lineno
def _find_first_cython_or_python_frame(self):
frame = gdb.selected_frame()
while frame:
if (self.is_cython_function(frame)
or self.is_python_function(frame)):
frame.select()
return frame
frame = frame.older()
raise gdb.GdbError("There is no Cython or Python frame on the stack.")
def invoke(self, arg, from_tty):
""" print info """
try:
argv = gdb.string_to_argv(arg)
if len(argv) == 1 and sys_info.is_valid_ptr(int(argv[0], 0)):
ipc_port = int(argv[0], 0)
gdb.write(types.IPCPort(ipc_port).print_ipc_port_info() + '\n')
else:
gdb.write("wrong args\n")
except Exception:
raise gdb.GdbError(traceback.format_exc())
def parseDwarfExpression(variableName, variableLength, address, lines,
startLine):
"""Parse a DWARF expression to get location of a variable"""
validTarget = False
index = startLine
while dwarfExprPrefixMatcher.match(lines[index]):
tokens = lines[index].split()
tokenLen = len(tokens[1])
if tokens[1] == "DW_OP_addr":
# Address of variable is as specified by the DWARF op operand
validTarget = True
target = tokens[2]
elif tokenLen > 9 and tokens[1][0:10] == "DW_OP_breg":
# Value of variable is specified register + offset
validTarget = True
target = "( %" + tokens[3][2:5] + " + " + tokens[2] + " )"
elif tokens[1] == "DW_OP_bregx":
# Value of variable is specified register + offset
# remaining tokens are probably
# register %s [$%s] offset %s
# see http://www.cygwin.com/ml/gdb-patches/2010-06/msg00011.html
validTarget = True
target = "( %" + tokens[4][2:5] + " + " + tokens[6] + " )"
elif tokenLen > 8 and tokens[1][0:9] == "DW_OP_reg":
# The variable value is in the specified register
validTarget = True
target = "%" + tokens[2][2:5]
elif tokens[1] == "DW_OP_regx":
# The variable value is in the specified register
# remaining tokens are probably
# %s [$%s]
# see http://www.cygwin.com/ml/gdb-patches/2010-06/msg00011.html
validTarget = True
target = "%" + tokens[1][2:5]
elif tokens[1] != "DW_OP_stack_value":
# The DWARF opcode does not represent a
# specific register or memory address, so
# it invalidates the target in the case where
# the value of the register or memory
# location is important (pin break ...)
validTarget = False
index = index + 1
# If target is a register then no variable length is returned
if validTarget:
if target[0] == "%":
return (target, "")
else:
return (target, variableLength)
else:
raise gdb.GdbError(
"ERROR: Unable to resolve variable %s, representation in DWARF debug info too complex"
% variableName)
def _awk(self, script, command):
args = ["awk", "-f", self._awk_script_path(script), str(command)]
if self.verbose:
print "### awk command: " + str(args)
awk_output = ""
try:
awk_output = check_output(args)
except subprocess.CalledProcessError, e:
raise gdb.GdbError("### Error in subprocess awk " + str(args))
def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
if len(argv) != 1:
raise gdb.GdbError('offsets-of takes exactly 1 argument.')
stype = gdb.lookup_type(argv[0])
print("@@@@start")
for field in stype.fields():
print(' [0x%x] %s' % (field.bitpos // 8, field.name))
print("@@@@end")
def list_for_each(head):
if head.type == list_head.get_type().pointer():
head = head.dereference()
elif head.type != list_head.get_type():
raise gdb.GdbError("Must be struct list_head not {}"
.format(head.type))
node = head['next'].dereference()
while node.address != head.address:
yield node.address
node = node['next'].dereference()
def invoke(self, cyname, frame=None):
globals_dict = self.get_cython_globals_dict()
cython_function = self.get_cython_function(frame)
if self.is_initialized(cython_function, cyname):
cname = super(CyCValue, self).invoke(cyname, frame=frame)
return gdb.parse_and_eval(cname)
elif cyname in globals_dict:
return globals_dict[cyname]._gdbval
else:
raise gdb.GdbError("Variable %s is not initialized." % cyname)
def invoke(self, args, fromTty):
self.dont_repeat()
parser = GdbOptionParser("show citizen")
if False:
parser.add_option("object", help="The object in question")
opts = parser.parse_args(args)
if opts.help:
return
else:
opts, args = parser.parse_args(args)
if opts.help:
return
if not args:
raise gdb.GdbError("Please specify an object")
opts.object = args.pop(0)
if args:
raise gdb.GdbError("Unrecognised trailing arguments: %s" %
" ".join(args))
var = gdb.parse_and_eval(opts.object)
if re.search(r"shared_ptr<", str(var.type)):
var = var["px"]
if var.type.code != gdb.TYPE_CODE_PTR:
var = var.address
citizen = var.dynamic_cast(
gdb.lookup_type("lsst::daf::base::Citizen").pointer())
if not citizen:
raise gdb.GdbError(
"Failed to cast %s to Citizen -- is it a subclass?" %
opts.object)
citizen = citizen.dereference()
print(citizen)
def open(self, args: str, from_tty: bool) -> None:
argv = shlex.split(args)
if len(argv) < 2:
raise gdb.GdbError("kdumpfile target requires kernel image and vmcore")
vmlinux = argv[0]
filename = argv[1]
try:
self.kdump = kdumpfile(file=filename)
except Exception as e:
raise gdb.GdbError("Failed to open `{}': {}"
.format(filename, str(e)))
# pylint: disable=unsupported-assignment-operation
self.kdump.attr['addrxlat.ostype'] = 'linux'
KERNELOFFSET = "linux.vmcoreinfo.lines.KERNELOFFSET"
try:
attr = self.kdump.attr.get(KERNELOFFSET, "0") # pylint: disable=no-member
self.base_offset = int(attr, base=16)
except (TypeError, ValueError):
pass
# Load the kernel at the relocated address
# Unfortunately, the percpu section has an offset of 0 and
# ends up getting placed at the offset base. This is easy
# enough to handle in the percpu code.
result = gdb.execute("symbol-file {} -o {:#x}"
.format(vmlinux, self.base_offset),
to_string=True)
if self.debug:
print(result)
# We don't have an exec-file so we need to set the architecture
# explicitly.
arch = gdb.objfiles()[0].architecture.name()
result = gdb.execute("set architecture {}".format(arch), to_string=True)
if self.debug:
print(result)
def get_reads_content(fd: int) -> bytes:
"""
Searches in recorded history for all writes to `fd` and returns the content that was read from
that file (until end of history or until the file is closed).
"""
content = bytearray()
seen_any_read = False
unsigned_char_p = gdb.lookup_type("unsigned char").pointer()
for _ in iterate_events("name in ('close', 'read')"):
syscall_name = get_syscall_name()
# Both close and read accept the fd as first argument, see close(2) and read(2).
actual_fd = int(get_syscall_argument(0))
if actual_fd != fd:
# Not for the file we are interested in.
continue
if syscall_name == "read":
seen_any_read = True
# The return value is the number of bytes read.
n_read = int(get_syscall_result())
# The second argument is a buffer where the syscall wrote n_read bytes.
buff_p = get_syscall_argument(1).cast(unsigned_char_p)
# gdb.Value.string (with length set to n_read) can convert the buffer to a Python
# string, but we need to deal with non-Unicode content which is not supported directly
# by gdb.Value. Instead, we convert one byte at a time.
for i in range(n_read):
char_value = int(buff_p[i])
content.append(char_value)
elif syscall_name == "close":
# The file is being closed so there are not going to be further reads.
break
else:
raise gdb.GdbError(f"Unexpected syscall {syscall_name} encountered")
if not seen_any_read:
raise gdb.GdbError(f"Cannot find any read from file descriptor {fd}.")
return bytes(content)
def from_numpy(expr, array):
info = expr_to_info(expr)
rows, cols, rowMajor, innerType, data = info
eigen_sizeof = rows * cols * innerType.sizeof
if array.shape[0] != rows and array.shape[1] != cols:
raise gdb.GdbError(
"array dimensions {}x{} mismatch with eigen object {}x{}" %
(array.shape[0], array.shape[1], rows, cols))
if rowMajor:
v = array.astype(innerType.name, order='C', copy=False)
else:
v = array.T.astype(innerType.name, order='C', copy=False)
if eigen_sizeof != v.nbytes:
raise gdb.GdbError("size mismatch, cannot correct")
z = gdb.selected_inferior().write_memory(data, v, v.nbytes)
return array
def invoke(self, arg_str, from_tty):
if ExploreUtils.check_args("explore value", arg_str) == False:
return
value = ExploreUtils.get_value_from_str(arg_str)
if value is None:
raise gdb.GdbError(
(" '%s' does not evaluate to a value in the current "
"context." % arg_str))
return
Explorer.explore_expr(arg_str, value, False)
def get_remote_cython_globals_dict(self):
m = gdb.parse_and_eval('__pyx_m')
try:
PyModuleObject = gdb.lookup_type('PyModuleObject')
except RuntimeError:
raise gdb.GdbError(textwrap.dedent("""\
Unable to lookup type PyModuleObject, did you compile python
with debugging support (-g)?"""))
m = m.cast(PyModuleObject.pointer())
return m['md_dict']
def invoke(self, arg, from_tty):
""" Go over task iterator and print all task data """
if sys_info.is_in_kernel_space() is False:
gdb.write("\nYou are currently in user space, "
"this functionality is not available here.\n\n")
return
try:
max_length_proc = types.get_max_length_proc_name()
for task in iter(types.TasksIterator()):
gdb.write(task.print_task_info_short(max_length_proc)+'\n')
except Exception:
raise gdb.GdbError(traceback.format_exc())
def invoke(self, args, from_tty):
argv = gdb.string_to_argv(args)
if len(argv) != 1:
raise gdb.GdbError("Usage: lgc lua_State")
self.type_lookup()
m = re.match('0[xX][0-9a-fA-F]+', argv[0])
if m:
L = gdb.Value(int(argv[0], 16)).cast(self.lua_State_pointer_type)
else:
L = gdb.parse_and_eval(argv[0])
if not L:
print "L empty"
return
g = L['glref']['ptr32'].cast(self.global_State_pointer_type)
root = g['gc']['root']['gcptr32'].cast(self.GCObj_pointer_type)
u = root
table_num = 0
if u:
u = u['gch']['nextgc']['gcptr32'].cast(self.GCObj_pointer_type)
agg = Aggregate()
#print u == root
while u != root:
#print u['gch']['gct']
if u['gch']['nextgc']['gcptr32'] == 0:
break
u = u['gch']['nextgc']['gcptr32'].cast(self.GCObj_pointer_type)
if u['gch']['gct'] == 11:
table_num += 1
tab = u['tab']
#sys.stdout.write("<tab: %s>(%s, %s)\n" % (tab.address, tab['asize'], tab['hmask']))
nodes = tab['node']['ptr32'].cast(self.Node_pointer_type)
idx_list = []
node_num = 0
for i in xrange(tab['hmask'] + 1):
if nodes[i]['val']['it'] != self.LJ_TNIL:
idx = self.hashkey(tab, nodes[i]['key'])
idx_list.append(int(idx.__str__()))
node_num += 1
#print "node[%s] idx=%s" % (i, idx)
#print "list = %s" % idx_list
collide_num = self.dup_num(idx_list)
if node_num > 0:
agg << self.histogram(idx_list)
#self.hist_log_calc(self.histogram(idx_list))
#print "sum, count:%d %d" %(self.sum_total, self.collide_count)
print "table number: %d" % table_num
print "collusion distribution:"
agg.hist_log_print()
def chooseDevice():
# identify device
devs = getDevices()
# wait for a device if no device is found
while not devs:
try:
print 'ADB: waiting for device... (Ctrl+C to stop)'
waitForDevice()
except gdb.GdbError, KeyboardInterrupt:
raise gdb.GdbError(' ADB: no device')
devs = getDevices()
def get_current_cpu():
if utils.get_gdbserver_type() == utils.GDBSERVER_QEMU:
return gdb.selected_thread().num - 1
elif utils.get_gdbserver_type() == utils.GDBSERVER_KGDB:
tid = gdb.selected_thread().ptid[2]
if tid > (0x100000000 - MAX_CPUS - 2):
return 0x100000000 - tid - 2
else:
return tasks.get_thread_info(tasks.get_task_by_pid(tid))['cpu']
else:
raise gdb.GdbError("Sorry, obtaining the current CPU is not yet "
"supported with this gdb server.")
def invoke(self, arg, from_tty):
"Invoke the command."
args = gdb.string_to_argv(arg)
if not 0 < len(args) < 3:
raise gdb.GdbError("ty-config: bad number of arguments")
key = args[0]
if len(args) == 1:
print("ctycat config: %s = %d" % (key, config_get(key)))
else:
config_set(key, args[1])
def func_and_offset(addr):
'''Return the function and offset into that function of `addr`.
If failed to find the function at the given address, return (None, None).
'''
# If given @plt addresses (or other problematic functions) just ignore
# them and return an error message -- (better than raising an error?)
try:
block = gdb.block_for_pc(addr)
except RuntimeError as e:
# If this is an exception we don't know about, raise.
if e.args != ('Cannot locate object file for block.',):
raise
# Attempt to work with symbols that don't have debugging information.
retval = gdb.execute('info symbol {}'.format(addr),
False, True)
# Checking for section ".text" removes @plt stubs and variables.
if 'in section .text' not in retval:
print('{} is not a .text location'.format(addr))
return (None, None)
# At the moment I believe that all awkward output (i.e. of the form
# funcname(function, argument, types) in section .text of /home/matthew/temp_dir/gdb/gdb/gdb
# are avoided because when there is debug info we've used the alternate
# method. Hence, the output should be of the form
# <funcname> + <offset> in section .text of <objfile>
# If this isn't the case, alert user so I know there's a problem and
# can investigate what I've missed.
#
# NOTE: I believe that digits are always printed in decimal -- can't
# find any way to change this, so I believe there isn't one.
# If this isn't the case, then I hopefully will notice the problem when
# this function fails.
sym_match = re.match('(\S+)( \+ (\d+))? in section .text', retval)
if not sym_match:
print('Cannot parse output from command `info symbol {}`.'.format(
addr))
return (None, None)
offset = int(sym_match.group(3)) if sym_match.group(3) else 0
return (sym_match.group(1), offset)
while block.function is None:
if block.superblock:
block = block.superblock
else:
raise gdb.GdbError('Could not find enclosing function of '
'{} ({})'.format(addr, arg))
offset = addr - block.start
return (block.function.name, offset)
def invoke(self, arg, from_tty):
args = gdb.string_to_argv(arg)
if len(args) >= 1:
if args[0] not in self.vendors:
raise gdb.GdbError("Invalid vendor name")
return
vendor_name = args[0]
vendor_filenames = self.vendors[vendor_name]
if len(args) == 1:
raise gdb.GdbError("Usage: svd_load <vendor-name> <filename.svd>")
elif len(args) >= 2:
filename = args[1]
try:
parser = SVDParser.for_packaged_svd(vendor_name, filename)
_svd_printer.set_device(parser.get_device())
except IOError:
raise gdb.GdbError("Failed to load SVD file")
else:
print("Loaded {}/{}".format(vendor_name, filename))
else:
raise gdb.GdbError("Usage: svd_load <vendor-name> <filename.svd>")
def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
if len(argv) != 1:
raise gdb.GdbError('offsets-of takes exactly 1 argument.')
stype = gdb.lookup_type(argv[0])
str0 = argv[0]
words = str0.split()
f = open(words[1] + ".struct", 'w')
#print argv[0], '{'
self.printFields(f, stype, "", 0)
#print '}'
f.close()
def invoke(self, arg, from_tty):
try:
args = gdb.string_to_argv(arg)
answer = ask_user_confirmation(args[0])
if answer == "y":
print("User confirmed action ...")
elif answer == "n":
raise gdb.GdbError("User declined action ... Aborting")
else:
return
except KeyboardInterrupt:
pass